Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Armada 2004-2009 Approved Nissan Armada 2006 ATC
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J AIR CONDITIONER
A
AUTOMATIC AIR CONDITIONER
SECTION ATC B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 5 . AIR CONDITIONER CONTROL .............................. 25 . F
Precautions for Supplemental Restraint System Description ............................................................. 25
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Operation ............................................................... 25
.
SIONER" ................................................................. 5. AIR MIX DOORS CONTROL ............................. 25 . G
Precautions for Working with HFC-134a (R-134a) 5 ..... BLOWER SPEED CONTROL ............................ 25 .
Contaminated Refrigerant ....................................... 5 . INTAKE DOOR CONTROL ................................ 25 .
General Refrigerant Precautions ............................. 6 . MODE DOOR CONTROL .................................. 25 .
H
Precautions for Leak Detection Dye ........................ 6 . DEFROSTER DOOR CONTROL ....................... 25 .
A/C Identification Label ........................................... 6 . MAGNET CLUTCH CONTROL .......................... 26 .
Precautions for Refrigerant Connection .................. 7 . SELF-DIAGNOSTIC SYSTEM ........................... 26 .
FEATURES OF NEW TYPE REFRIGERANT Description of Control System ............................... 27 . I
CONNECTION ..................................................... 7 . Control Operation .................................................. 27
.
O-RING AND REFRIGERANT CONNECTION ..... 8 DISPLAY SCREEN ............................................. 28 .
Precautions for Servicing Compressor ...................11 . AUTO SWITCH .................................................. 28 . ATC
Precautions for Service Equipment ........................11 . TEMPERATURE CONTROL DIAL (TEMPERA-
RECOVERY/RECYCLING EQUIPMENT ............11 . TURE CONTROL) (DRIVER SIDE) .................... 28 .
ELECTRONIC LEAK DETECTOR ......................11 . TEMPERATURE CONTROL DIAL (TEMPERA-
K
VACUUM PUMP ................................................ 12 . TURE CONTROL) (PASSENGER SIDE) ........... 28 .
MANIFOLD GAUGE SET ................................... 12 . TEMPERATURE CONTROL DIAL (TEMPERA-
SERVICE HOSES .............................................. 12 . TURE AND MODE CONTROL) (REAR) ............ 28 .
SERVICE COUPLERS ....................................... 13 . RECIRCULATION () SWITCH ............................ 28 . L
REFRIGERANT WEIGHT SCALE ..................... 13 . DEFROSTER () SWITCH ................................... 28 .
CHARGING CYLINDER ..................................... 13 . REAR WINDOW DEFOGGER SWITCH ............ 28 .
PREPARATION ........................................................ 14 . OFF SWITCH ..................................................... 28 . M
Special Service Tools ............................................ 14 . A/C SWITCH ...................................................... 28.
HFC-134a (R-134a) Service Tools and Equipment 14 ... MODE SWITCH (FRONT) .................................. 28 .
Commercial Service Tools ..................................... 17 . FRONT BLOWER CONTROL DIAL ................... 28 .
REFRIGERATION SYSTEM .................................... 18 . TEMPERATURE CONTROL DIAL (TEMPERA-
Refrigerant Cycle .................................................. 18 . TURE AND MODE CONTROL) .......................... 29 .
REFRIGERANT FLOW ...................................... 18 . REAR BLOWER CONTROL DIAL ..................... 29 .
Refrigerant System Protection .............................. 18 . Discharge Air Flow ................................................ 30.
REFRIGERANT PRESSURE SENSOR ............ 18 . FRONT ............................................................... 30
.
PRESSURE RELIEF VALVE .............................. 19 . REAR ................................................................. 30
.
Component Layout ................................................ 20 . System Description (Front) .................................... 31 .
FRONT REFRIGERATION SYSTEM ................. 20 . SWITCHES AND THEIR CONTROL FUNCTION 31 ...
REAR REFRIGERATION SYSTEM ................... 21 . System Description (Rear) .................................... 32 .
OIL ........................................................................... 22
. SWITCHES AND THEIR CONTROL FUNCTION 32 ...
Maintenance of Oil Quantity in Compressor ......... 22 . CAN Communication System Description ............. 33 .
OIL ..................................................................... 22
. TROUBLE DIAGNOSIS ........................................... 34 .
CHECKING AND ADJUSTING .......................... 22 . CONSULT-II Function (HVAC) ............................... 34 .
Revision: October 2006 ATC-1 2006 Armada
CONSULT-II BASIC OPERATION ...................... 34 . DOOR MOTOR (PASSENGER) .........................97 .
SELF-DIAGNOSIS ............................................. 35 . DIAGNOSTIC PROCEDURE FOR AIR MIX
DATA MONITOR ................................................. 35 . DOOR MOTOR (REAR) ................................... 104 .
CONSULT-II Function (BCM) ................................. 37 . Intake Door Motor Circuit ..................................... 111 .
CONSULT-II BASIC OPERATION ...................... 37 . INSPECTION FLOW ......................................... 111 .
DATA MONITOR ................................................. 38 . SYSTEM DESCRIPTION .................................. 112 .
How to Perform Trouble Diagnosis for Quick and COMPONENT DESCRIPTION ......................... 113 .
Accurate Repair ..................................................... 39 . DIAGNOSTIC PROCEDURE FOR INTAKE
WORK FLOW ..................................................... 39 . DOOR MOTOR ................................................. 113 .
SYMPTOM TABLE ............................................. 39 . Defroster Door Motor Circuit ................................ 116 .
Component Parts and Harness Connector Location 40 ... SYMPTOM: ....................................................... 116 .
ENGINE COMPARTMENT ................................. 40 . INSPECTION FLOW ......................................... 116 .
FRONT PASSENGER COMPARTMENT ........... 41 . SYSTEM DESCRIPTION .................................. 117 .
REAR PASSENGER COMPARTMENT .............. 42 . COMPONENT DESCRIPTION ......................... 117 .
Schematic .............................................................. 43 . DIAGNOSTIC PROCEDURE FOR
WITH NAVI ......................................................... 43 . DEFROSTER DOOR MOTOR .......................... 118 .
WITHOUT NAVI .................................................. 44 . Front Blower Motor Circuit ................................... 125 .
Wiring Diagram -- A/C,A -- .................................. 45 . INSPECTION FLOW ......................................... 125 .
WITH NAVI ......................................................... 45 . SYSTEM DESCRIPTION .................................. 126 .
WITHOUT NAVI .................................................. 55 . COMPONENT DESCRIPTION ......................... 127 .
Front Air Control Terminals and Reference Value... 65 DIAGNOSTIC PROCEDURE FOR BLOWER
PIN CONNECTOR TERMINAL LAYOUT ........... 65 . MOTOR ............................................................. 127.
TERMINALS AND REFERENCE VALUE FOR COMPONENT INSPECTION ............................ 136 .
FRONT AIR CONTROL (WITH NAVI) ................ 65 . Rear Blower Motor Circuit .................................... 137 .
TERMINALS AND REFERENCE VALUE FOR INSPECTION FLOW ......................................... 137 .
FRONT AIR CONTROL (WITHOUT NAVI) ........ 67 . SYSTEM DESCRIPTION .................................. 138 .
A/C System Self-diagnosis Function ..................... 69 . DIAGNOSTIC PROCEDURE FOR REAR
DESCRIPTION ................................................... 69 . BLOWER MOTOR ............................................ 138 .
Operational Check (Front) ..................................... 71 . COMPONENT INSPECTION ............................ 146 .
CHECKING MEMORY FUNCTION .................... 71 . Rear Air Control Circuit ........................................ 148 .
CHECKING BLOWER ........................................ 71 . INSPECTION FLOW ......................................... 148 .
CHECKING DISCHARGE AIR ........................... 71 . SYSTEM DESCRIPTION .................................. 149 .
CHECKING RECIRCULATION (, ONLY) ............ 71 . DIAGNOSTIC PROCEDURE FOR REAR AIR
CHECKING TEMPERATURE DECREASE ........ 71 . CONTROL ........................................................ 149 .
CHECKING TEMPERATURE INCREASE ......... 72 . Magnet Clutch Circuit ........................................... 151 .
CHECK A/C SWITCH ......................................... 72 . INSPECTION FLOW ......................................... 151 .
CHECKING AUTO MODE .................................. 72 . SYSTEM DESCRIPTION .................................. 152 .
Operational Check (Rear) ...................................... 73 . DIAGNOSTIC PROCEDURE FOR MAGNET
CHECKING BLOWER ........................................ 73 . CLUTCH ........................................................... 152 .
CHECKING TEMPERATURE DECREASE ........ 73 . Insufficient Cooling ............................................... 160 .
CHECKING TEMPERATURE INCREASE ......... 73 . INSPECTION FLOW ......................................... 160 .
Power Supply and Ground Circuit for Front Air Con- PERFORMANCE TEST DIAGNOSES ............. 161 .
trol .......................................................................... 74
. PERFORMANCE CHART ................................. 163 .
INSPECTION FLOW .......................................... 74 . TROUBLE DIAGNOSES FOR UNUSUAL PRES-
COMPONENT DESCRIPTION ........................... 75 . SURE ................................................................ 164
.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM 75 ... Insufficient Heating .............................................. 167 .
Mode Door Motor Circuit ....................................... 78 . INSPECTION FLOW ......................................... 167 .
INSPECTION FLOW .......................................... 78 . Noise .................................................................... 168
.
SYSTEM DESCRIPTION ................................... 79 . INSPECTION FLOW ......................................... 168 .
COMPONENT DESCRIPTION ........................... 80 . Self-diagnosis ...................................................... 170.
DIAGNOSTIC PROCEDURE FOR MODE INSPECTION FLOW ......................................... 170 .
DOOR MOTOR .................................................. 80 . Memory Function ................................................. 171 .
Air Mix Door Motor Circuit ..................................... 87 . INSPECTION FLOW ......................................... 171 .
INSPECTION FLOW .......................................... 87 . Water Valve Circuit ............................................... 171 .
SYSTEM DESCRIPTION ................................... 88 . COMPONENT DESCRIPTION ......................... 171 .
COMPONENT DESCRIPTION ........................... 89 . DIAGNOSTIC PROCEDURE FOR WATER
DIAGNOSTIC PROCEDURE FOR AIR MIX VALVE ............................................................... 172
.
DOOR MOTOR (DRIVER) .................................. 89 . Ambient Sensor Circuit ........................................ 175 .
DIAGNOSTIC PROCEDURE FOR AIR MIX COMPONENT DESCRIPTION ......................... 175 .
Revision: October 2006 ATC-2 2006 Armada
AMBIENT TEMPERATURE INPUT PROCESS. 175 DEFROSTER DOOR MOTOR ............................... 206 .
DIAGNOSTIC PROCEDURE FOR AMBIENT Removal and Installation ..................................... 206 . A
SENSOR .......................................................... 175 . REMOVAL ........................................................ 206 .
COMPONENT INSPECTION ........................... 178 . INSTALLATION ................................................ 206 .
In-vehicle Sensor Circuit ..................................... 179 . INTAKE DOOR MOTOR ........................................ 207 . B
COMPONENT DESCRIPTION ........................ 179 . Removal and Installation ..................................... 207 .
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE REMOVAL ........................................................ 207 .
SENSOR .......................................................... 180 . INSTALLATION ................................................ 207 .
COMPONENT INSPECTION ........................... 183 . MODE DOOR MOTOR ........................................... 208 . C
Optical Sensor Circuit ......................................... 184 . Removal and Installation ..................................... 208 .
COMPONENT DESCRIPTION ........................ 184 . REMOVAL ........................................................ 208 .
OPTICAL INPUT PROCESS ........................... 184 . INSTALLATION ................................................ 208 . D
DIAGNOSTIC PROCEDURE FOR OPTICAL AIR MIX DOOR MOTOR ........................................ 209 .
SENSOR .......................................................... 184 . Components ........................................................ 209 .
Intake Sensor Circuit ........................................... 187 . Removal and Installation ..................................... 209 . E
COMPONENT DESCRIPTION ........................ 187 . FRONT AIR MIX DOOR MOTOR (DRIVER) .... 209 .
DIAGNOSTIC PROCEDURE FOR INTAKE SEN- FRONT AIR MIX DOOR MOTOR (PASSENGER) 210 .
SOR ................................................................. 187
. REAR AIR MIX DOOR MOTOR ....................... 210 .
COMPONENT INSPECTION ........................... 190 . VARIABLE BLOWER CONTROL .......................... 211 . F
CONTROL UNIT .................................................... 191 . Removal and Installation ..................................... 211 .
Removal and Installation ..................................... 191 . REMOVAL ........................................................ 211 .
FRONT AIR CONTROL ................................... 191 . INSTALLATION ................................................ 211 . G
REAR AIR CONTROL ...................................... 191 . REAR BLOWER MOTOR RESISTOR ................... 212 .
AMBIENT SENSOR ............................................... 192 . Removal and Installation ..................................... 212 .
Removal and Installation ..................................... 192 . REMOVAL ........................................................ 212 . H
REMOVAL ........................................................ 192 . INSTALLATION ................................................ 212 .
INSTALLATION ................................................ 192 . DUCTS AND GRILLES .......................................... 213 .
IN-VEHICLE SENSOR ........................................... 193 . Components ........................................................ 213 .
I
Removal and Installation ..................................... 193 . Removal and Installation ..................................... 216 .
REMOVAL ........................................................ 193 . CENTER CONSOLE HEAT DUCT AND REAR
INSTALLATION ................................................ 193 . FINISHER ASSEMBLY GRILLE ....................... 216 .
OPTICAL SENSOR ............................................... 194 . DEFROSTER NOZZLE .................................... 216 . ATC
Removal and Installation ..................................... 194 . RH AND LH SIDE DEMISTER DUCT .............. 216 .
INTAKE SENSOR .................................................. 195 . RH AND LH VENTILATOR DUCT .................... 216 .
Removal and Installation ..................................... 195 . CENTER VENTILATOR DUCT ........................ 216 . K
REMOVAL ........................................................ 195 . FLOOR DUCT .................................................. 216 .
INSTALLATION ................................................ 195 . REAR OVERHEAD DUCTS ............................. 217 .
BLOWER MOTOR ................................................. 196 . REAR FLOOR DUCT ....................................... 217 .
L
Components ........................................................ 196 . GRILLES .......................................................... 217 .
Removal and Installation ..................................... 196 . REFRIGERANT LINES .......................................... 218 .
FRONT BLOWER MOTOR .............................. 196 . HFC-134a (R-134a) Service Procedure .............. 218 .
REAR BLOWER MOTOR ................................ 197 . SETTING OF SERVICE TOOLS AND EQUIP- M
IN-CABIN MICROFILTER ...................................... 198 . MENT ............................................................... 218
.
Removal and Installation ..................................... 198 . Components ........................................................ 220 .
FUNCTION ....................................................... 198 . Removal and Installation for Compressor ........... 222 .
REPLACEMENT TIMING ................................. 198 . REMOVAL ........................................................ 222 .
REPLACEMENT PROCEDURE ...................... 198 . INSTALLATION ................................................ 223 .
HEATER & COOLING UNIT ASSEMBLY ............. 200 . Removal and Installation for Compressor Clutch . 223
Components ........................................................ 200 . REMOVAL ........................................................ 223 .
Removal and Installation ..................................... 201 . INSPECTION ................................................... 224 .
FRONT HEATER AND COOLING UNIT ASSEM- INSTALLATION ................................................ 224 .
BLY ................................................................... 201
. BREAK-IN OPERATION ................................... 226 .
REAR HEATER AND COOLING UNIT ASSEM- Removal and Installation for Low-pressure Flexible
BLY ................................................................... 202
. Hose .................................................................... 226
.
HEATER CORE ..................................................... 203 . REMOVAL ........................................................ 226 .
Components ........................................................ 203 . INSTALLATION ................................................ 226 .
Removal and Installation ..................................... 204 . Removal and Installation for High-pressure Flexible
FRONT HEATER CORE .................................. 204 . Hose .................................................................... 226
.
REAR HEATER CORE .................................... 205 . REMOVAL ........................................................ 226 .
Revision: October 2006 ATC-3 2006 Armada
INSTALLATION ................................................. 226 . REMOVAL ......................................................... 231 .
Removal and Installation for High-pressure Pipe . 226 INSTALLATION ................................................. 231 .
REMOVAL ........................................................ 226 . Removal and Installation for Rear Expansion Valve.231
INSTALLATION ................................................. 226 . REMOVAL ......................................................... 231 .
Removal and Installation for Low-pressure Pipe . 227 INSTALLATION ................................................. 232 .
REMOVAL ........................................................ 227 . Checking for Refrigerant Leaks ........................... 232 .
INSTALLATION ................................................. 227 . PRELIMINARY CHECK .................................... 232 .
Removal and Installation for Refrigerant Pressure Checking System for Leaks Using the Fluorescent
Sensor ................................................................. 227
. Dye Leak Detector ............................................... 232 .
REMOVAL ........................................................ 227 . Dye Injection ........................................................ 232
.
INSTALLATION ................................................. 227 . Electronic Refrigerant Leak Detector ................... 233 .
Removal and Installation for Condenser .............. 227 . PRECAUTIONS FOR HANDLING LEAK
REMOVAL ........................................................ 227 . DETECTOR ...................................................... 233 .
INSTALLATION ................................................. 228 . CHECKING PROCEDURE ............................... 234 .
Removal and Installation for Front Evaporator .... 229 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 236 .
REMOVAL ........................................................ 229 . Service Data and Specifications (SDS) ............... 236 .
INSTALLATION ................................................. 230 . COMPRESSOR ................................................ 236 .
Removal and Installation for Rear Evaporator ..... 230 . OIL .................................................................... 236
.
REMOVAL ........................................................ 231 . REFRIGERANT ................................................ 236 .
INSTALLATION ................................................. 231 . ENGINE IDLING SPEED .................................. 236 .
Removal and Installation for Front Expansion Valve 231 . BELT TENSION ................................................ 236 .
Revision: October 2006 ATC-4 2006 Armada
PRECAUTIONS
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EJS0033O
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
G To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. E
G Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. F
G Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G
Precautions for Working with HFC-134a (R-134a) EJS0033P
WARNING:
G CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants H
are mixed compressor failure is likely to occur. Refer to ATC-5, "Contaminated Refrigerant" . To
determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use recovery/recycling
equipment and refrigerant identifier. I
G Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
If oil other than that specified is used, compressor failure is likely to occur.
G The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following ATC
handling precautions must be observed:
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